メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.423888273126 43.0917712130459, 141.424383354024 43.0923202571848, 141.425574234484 43.0937094730801, 141.425430577935 43.0937594955056, 141.425160032836 43.0936611232948, 141.424361672594 43.0933710940699, 141.42371458674 43.0931359542925, 141.422603017235 43.0927247938974, 141.422081565873 43.0925319068582, 141.421903866249 43.0924661287293, 141.422984115336 43.092072508391, 141.422685508139 43.091706819911, 141.423014960009 43.091155432936, 141.423146698865 43.0909350609714, 141.423324947336 43.0911383334584, 141.423579841164 43.0914293671331, 141.423888273126 43.0917712130459)) ^^http://www.opengis.net/ont/geosparql#wktLiteral